The SAO/NASA Astrophysics Data System Abstract Service provides a
gateway to the online Astronomy and Physics literature.
You can navigate this content using the following query interfaces:

The new ADS,
featuring a clean new look, advanced search and filtering options
as well as visualizations.

Astronomy and Astrophysics Classic Search,
an legacy interface which searches the 2,325,279 records
currently in the Astronomy database,
including 200,133 abstracts from Planetary Sciences and Solar Physics journals

Physics and Geophysics Classic Search,
an legacy interface which searches the 9,384,916 records
currently in the Physics database,
including 627,790 abstracts from APS
journals and 463,630 abstracts from SPIE
conference proceedings

Science Education Classic Search,
a legacy interface to the literature in Science Education
Research and related publications (a selected subset of
publications from the above databases)

Each database contains abstracts from articles and monographs published
in the different disciplines. The databases cover all the major
journals, many minor journals, conference proceedings, several
Observatory reports and newsletters, many NASA reports, and PhD theses.

The arXiv e-print database contains preprints submitted to the
arXiv e-print archive.
ADS maintains this database to allow searches on the latest literature
being published, with links to the fulltext available from the arXiv.

We also provide access to scanned images of articles from most of
the major and most smaller astronomical journals, as well as
several conference proceedings series. All scanned articles are
linked to the corresponding references in the ADS. They can be accessed
through the search system linked to on this page or through
ADS browse interface.

As an additional service to the astronomical community,
ADS has also been maintaining a database of people involved in
astronomy research. If you need to locate somebody in the community,
you can use the
astroperson search form.